Jets quarterback Tim Tebow is sacked by Giants defensive back Will Hill during the fourth quarter of a 2012 preseason game at MetLife Stadium. / Debby Wong, USA TODAY Sports

by Tom Pelissero, USA TODAY Sports

by Tom Pelissero, USA TODAY Sports

New York Giants safety Will Hill has been suspended without pay for the first four games of the season for violating the NFL's substance-abuse policy, the team announced Saturday.

It's the second suspension in as many seasons for Hill, who served a four-game ban last year for violating the policy on performance-enhancing drugs. The Giants said that suspension was triggered by Hill's use of Adderall.

Hill, 23, will be eligible to participate in training camp, which begins for the Giants on Friday, and the preseason. He can return to the active roster Sept. 30.

Undrafted out of Florida in 2011, Hill played arena football for a year before signing a three-year contract with the Giants in May 2012. He played in 12 games last season and was credited with two passes defended and a forced fumble.